25 Ft Trailer Wiring Harness Extension Kit With 4 Way Flat Plug 5 Wire Male And 4 Wire Female Connectors 18 Gauge Ground Wire Heavy Duty Trailer Electrical Extension For No Fuss Quick Easy Tongue Run

Premium 25 ft Trailer Wiring Harness for Quick Tongue Run
✔️ 25 ft harness with 18 AWG copper, 5-to-4 wire 4-way plugs

Our 25 ft trailer wiring harness extension kit provides a simple, reliable way to power trailer lights through a 4-way flat plug, with a long run that splits along the trailer tongue. It’s a common setup for boat, horse, and cargo trailers and is built to handle outdoor use.

✅ Total length: 25 ft (300 in / 7620 mm); male extension 21.65 ft (259.8 in / 6600 mm) and female extension 3.94 ft (47.3 in / 1200 mm)
✅ Wire: 18 AWG copper conductors with tin plating for best conductivity and oxidation resistance
✅ Jacket & durability: tough PVC jacket resists corrosion and aging; works in sea water
✅ Connectors: 4-way flat male (5 wires) and 4-wire female (4 wires) for quick, secure installs
✅ Color coding: Green-right, Yellow-left, Brown-tail light, White-ground
✅ Application: ideal for under 80" wide trailers like marine boats, horse trailers, and cargo trailers

💡 What is a trailer wiring harness used for and why choose a 4‑way flat plug?

It’s a handy setup that lets you power a trailer’s lighting functions from the tow vehicle using a standard connector. - Handy for powering turn signals, brake lights, and tail lights with one easy connection - Durable copper conductors with tin plating resist corrosion in outdoor use - Easy to install along the trailer tongue with standard 4‑way flat plugs - Compatible with trailers up to 80" wide, including boat, horse, and cargo trailers